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Old 01-20-2011, 12:21 PM   #1
onefastgoat
Scooby Newbie
 
Member#: 230224
Join Date: Nov 2009
Default Outback overheating

Hey guys! I have a problem with my daily driver at the moment and I can not for the life of me seem to figure it out. Here are the symptoms and what has been replaced and what not.

Info

4 cylinder Outback
5 speed manual
125,000 miles.

The car will heat up normally no knocking or odd noises coming from the engine. Once the car is at the running temperature right in the middle with the heater blowing out normal hot air. Once it gets there after about 5 minutes the temperature will start to go up slowly only while the car is driving. The second the car is either not moving i.e idling or i push the clutch in and coast the cars temperature will start to go back down to normal and reach the normal operating temp. Now this is were it gets weird if the car is over heating and you push the clutch and rev the car and hold it at 3k or 4k the cars temperature will go down!!!!! This completely blows my mind. There is no exhaust gas coming out of the radiator no oil in there either.

Thermostat has been replaced and coolant has been properly flushed and burped.
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Old 01-20-2011, 01:19 PM   #2
PA-Outback2000
Scooby Specialist
 
Member#: 161832
Join Date: Oct 2007
Chapter/Region: Tri-State
Location: PA
Vehicle:
2000 Outback Limited
Black

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burped?

check coolant usage over a week to see if it goes down. check head gasket area and for leaks under the car, they may be going. what yr car is it?
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Old 01-20-2011, 01:57 PM   #3
beaconhillkilla
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Member#: 174710
Join Date: Mar 2008
Chapter/Region: NWIC
Location: Seattle
Vehicle:
1992 Legacy Turbo
Dream Machine

Default

Even if there isn't any smoke or oil in the coolant, check for a head gasket. Those cars are absolutely notorious for blowing them.
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Old 01-20-2011, 02:33 PM   #4
onefastgoat
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Member#: 230224
Join Date: Nov 2009
Default

The year is a 2002 if that helps.
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Old 01-20-2011, 06:40 PM   #5
Bluefoton
Scooby Specialist
 
Member#: 141373
Join Date: Feb 2007
Chapter/Region: E. Canada
Location: Quebec, QC
Vehicle:
2008 2.5i-hatch -
now with a HID retrofit

Default

I vote for HG as well. It creates bubbes in your coolant. At idle when heated after a drive, it impedes coolant circulation, so it heats more. Reving it a bit turns the water pump, which stirrs the bubble and helps cooling it as well. Sorry, had the very same symptoms just recently.

By the way - if you're on your stock clutch, might be worth replacing it when the HGs are done. The engine is out, the clutch is in the open, so it takes literally zero additional work to replace it - you are saving a few hundreds $ in labour (assuming you want to keep the car for a while).
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